Earthquake-resistant repair valve

Abstract

To provide an earthquake-proof repair valve capable of preventing a component of a repair valve main body from being damaged in a case where the earthquake-proof repair valve is suddenly flexibly extended / contracted, the earthquake-proof repair valve presenting earthquake-proofness by extension / contraction flexibility.SOLUTION: A flange part 21 is formed at a secondary side of a body 22 of a repair valve main body 10 and an insertion port 26 is formed at a primary side of the body 22, respectively. The insertion port 26 is fitted in a freely fitting state at an inner peripheral side of a holder 11 consisting of an annular push ring 41 and an annular socket member 40. An extension / contraction flexible mechanism mounting a stopper ring 44 and a rubber ring 48 between the insertion port 26 and the holder 11 is incorporated. A substantially cylindrical tilt correction jig 20 formed from an elastic material is mounted in a locked state between the flange part 21 and the holder 11. In a case where the repair valve main body 10 is flexibly tilted, the repair valve main body 10 is provided so as to be flexible extended / contracted while bending or damaging the tilt correction jig 20 and while absorbing shock by elasticity of the tilt correction jig 20, thereby suppressing a sudden flexible extending / contracting action of the repair valve main body 10.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an earthquake-resistant repair valve having earthquake resistance, and in particular to an earthquake-resistant repair valve having a joint structure having expansion and contraction flexibility. [Background technology]

[0002] Conventionally, for example, fire hydrants and air valves are generally connected to water pipes buried underground via branch pipes in an upright state. Usually, a repair valve is provided directly below the fire hydrant or air valve, and the primary side repair valve cuts off the water pressure applied to the fire hydrant or air valve from the water pipe, allowing the secondary side fire hydrant or air valve to be maintained or replaced. If the fire hydrant or air valve is buried underground in this way, if an earthquake occurs and the ground changes, the fire hydrant or air valve may be damaged due to the displacement of the water pipe. As a countermeasure against this, a method is known in which the fire hydrant or air valve is connected to the branch pipe via an earthquake-resistant repair valve with a joint structure having expansion and contraction flexibility.

[0003] As an example of this type of repair valve, the applicant has filed an application for an earthquake-resistant repair valve in Patent Document 1. In this repair valve, a retaining ring and a rubber ring are attached between the body's insertion port and the receiving port member when the body is inserted into the receiving port member, and the retaining ring and the rubber ring are pressed and integrated by a pressure ring. This allows the body side to be flexible and expandable around the swing direction relative to the receiving port member through the insertion port, and the rubber ring ensures sealing properties to prevent water leakage.

[0004] When a fire hydrant or air valve is installed underground using such a joint structure, it is connected in the state shown in Figure 6(a) and Figure 6(b), for example. In the case of Figure 6(a), a valve box (pit) 2 is formed from the ground surface 3 so as to reach a water pipe 1 buried horizontally in the ground, and a branch section 4 branched off from the water pipe 1 is placed inside this valve box 2. A repair valve 5 having elasticity is connected to the upper part of the branch section 4 in an upright state with a gap provided between it and the wall surface 2a of the valve box 2. An air valve 6 is connected to the upper part of the repair valve 5, and this air valve 6 allows air inside the water pipe 1 to escape to the outside.

[0005] In Fig. 6(b), a fire hydrant 7 is connected to the position of the air valve in Fig. 6(a), and water is supplied to the outside through this fire hydrant 7. In this case, as in the case of Fig. 6(a), a repair valve 5 is connected in an upright position to the top of the branch 4 of the water pipe 1, and the fire hydrant 7 is connected to the top of this repair valve 5. In the event of an earthquake, as shown in Figures 6(a) and 6(b), the body 5a of each repair valve 5 flexes and expands in the vibration direction and connection direction relative to the water pipe 1 side to absorb external forces and prevent damage to the air valve 6, fire hydrant 7, and branch section 4.

[0006] On the other hand, Patent Document 2 relates to an earthquake-resistant joint for a branch pipe, which is provided to connect a branch pipe branched off from a main pipe to a connecting pipe to which terminal equipment is connected. In this joint, an annular seal member is attached to the inner circumference of the branch pipe, and the fixed flange portion of the branch pipe and the movable flange portion of the connecting pipe are connected with a connecting bolt in a state in which a cylindrical spacer made of an elastic body is interposed in the space formed between the fixed flange portion of the branch pipe and the movable flange portion of the connecting pipe. In this way, when the terminal equipment side shakes during an earthquake or the like and a bending moment acts on the branch pipe and the connecting pipe, the spacer is used to mitigate the force in the swing direction, preventing damage to the connecting bolt while preventing damage to the joint and water leakage with the seal member. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2017-172799 A [Patent Document 2] Patent No. 6341722 Summary of the Invention [Problem to be solved by the invention]

[0008] In the former Patent Document 1, if the repair valve 5 is installed in the state shown in Figures 6(a) and 6(b), the fire hydrant 7 and air valve 6 may collide with the valve case 2 due to relative displacement between the ground and the pipeline during an earthquake, causing the repair valve 5 to expand and contract and tilt. In this case, if no leakage or damage is found in the repair valve 5, only the valve case 2 may be replaced during restoration work, and the repair valve 5 may be reused as is. However, if excessive force is applied to the repair valve 5 and it bends, it becomes difficult to maintain this state when it is returned from the tilted state to the upright state. Therefore, as shown in Fig. 7(a), the repair valve 5 may tilt and the horizontal installation state of the air valve 6 may not be able to be maintained, and the air valve 6 may not be able to fully function, which may cause water leakage. Also, as shown in Fig. 7(b), when the repair valve 5 is tilted and a valve opener 8 for opening and closing operation is attached to this repair valve 5, the valve opener 8 may interfere with the valve case 2, making operation difficult, or the valve opener 8 may not be able to be attached and opening and closing operation may become impossible. Even if an attempt was made to replace damaged internal parts of the repair valve 5 and maintain it in an upright position, this would be difficult to do because the repair valve 5 is buried and connected to the branch section 4, and even if the repair valve 5 were to be removed from the branch section 4 to replace the parts, the work would require cutting off the water supply.

[0009] On the other hand, the earthquake-resistant joint of the latter Patent Document 2 uses a cylindrical spacer to reduce the force in the swing direction when an earthquake occurs, and is not intended to return the repair valve from its flexible state after an earthquake to an upright state and hold it upright again, for example, if a repair valve is provided at the end of the earthquake-resistant joint. Furthermore, since the spacer is integrated between the branch pipe and the connecting pipe as a joint part and the sealing property of the sealing member is ensured through the flexibility of the spacer, when the spacer is damaged, it is necessary to replace the spacer to restore its flexibility. When replacing the spacer, it is necessary to loosen the connecting bolt and remove the connecting pipe from the branch pipe, which makes the replacement work difficult.

[0010] The present invention was developed to solve the above-mentioned problems, and its purpose is to provide an earthquake-resistant repair valve that exhibits earthquake resistance through its elastic flexibility, and that can prevent damage to the parts of the repair valve body in the event of sudden elastic flexibility. [Means for solving the problem]

[0011] In order to achieve the above object, the invention according to claim 1 provides a repair valve body having a flange portion formed on the secondary side of the body and an insertion port formed on the primary side of the body, the insertion port being inserted in a loosely fitted state into the inner periphery of a holder consisting of an annular press ring and an annular receiving member, and an elastic flexible mechanism having a stopper ring and a rubber ring attached between the insertion port and the holder is built in, and a fixing flange portion is provided between the flange portion and the holder or in the middle of a long extension pipe extending from the insertion port. A holder provided at the end of the extension pipe A generally cylindrical tilt correction jig made of an elastic material is attached between the fixing flange and the A holder provided at the end of the extension pipe The gap distance between the flange and Holder when no extension pipe is installed and the height of the tilt correction jig is set to be approximately the same, so that when the repair valve body flexes and tilts, the repair valve body bends or damages the tilt correction jig, but the elasticity of the tilt correction jig absorbs the impact and expands and contracts, thereby suppressing the sudden expansion and contraction of the repair valve body.

[0012] The invention according to claim 2 is a tilt correction jig. 、 This is an earthquake-resistant repair valve made by processing elastic resin material.

[0014] Claim 3 The invention relates to an earthquake-resistant repair valve in which, when a repair valve body with a tilt correction jig attached thereto bends and tilts, the bent or damaged tilt correction jig is removed from the repair valve body, and a different tilt correction jig is attached while the repair valve body is again in an upright position. Effect of the Invention

[0015] According to the invention of claim 1, a flange portion is formed on the secondary side of the body of the repair valve main body, and an insertion port is formed on the primary side of the body. The insertion port is inserted in a loosely fitted state into the inner periphery of a holder consisting of an annular press ring and an annular receiving member. An expansion and contraction flexible mechanism equipped with a stopper ring and a rubber ring is built in between the insertion port and the holder. A fixing flange portion is provided between the flange portion and the holder or in the middle of a long extension pipe extending the insertion port. A holder provided at the end of the extension pipe A generally cylindrical tilt correction jig made of an elastic material is attached between the fixing flange and the A holder provided at the end of the extension pipe The gap distance between the flange and Holder when no extension pipe is installed Since the gap distance between the valve body and the inclination correction jig is set to be approximately the same, and the height of the inclination correction jig is set to be approximately the same, even when the repair valve body is extended and laid at a deep position, a single type of inclination correction jig can be easily attached with a single touch without the need for a different inclination correction jig. Furthermore, when the repair valve body flexes and tilts, the repair valve body bends or damages the tilt correction jig, but the elasticity of the tilt correction jig absorbs the impact and expands and contracts, thereby suppressing the sudden expansion and contraction of the repair valve body, thereby preventing damage to the repair valve body by suppressing the sudden expansion and contraction of the repair valve body.

[0016] According to the invention of claim 2, the tilt correction jig is 、 Since it is manufactured using a resin material with elasticity, it is lightweight while ensuring strength, and the repair valve can be kept upright for a long period of time.

[0018] Claim 3 According to the present invention, even if the tilt correction jig is bent, deformed or damaged, it can be replaced, making it extremely valuable in use. [Brief description of the drawings]

[0019] [Figure 1] 1A and 1B are schematic diagrams showing an embodiment of an earthquake-resistant repair valve according to the present invention, in which (a) is a front view of the earthquake-resistant repair valve, and (b) is a plan view of the earthquake-resistant repair valve. [Diagram 2] 1(a) is a side view of the earthquake-resistant repair valve, and (b) is a vertical cross-sectional view of FIG. 1(a). [Diagram 3] 1A is an exploded perspective view of the inclination correction jig, FIG. 1B is a front view of the inclination correction jig, and FIG. 1C is a plan view of FIG. [Figure 4] 1A is a plan view showing another example of the tilt correcting jig, and FIG. 1B is an enlarged sectional view of part A in FIG. [Diagram 5] 1A is a front view showing another example of an earthquake-resistant repair valve, and FIG. 1B is a central vertical cross-sectional view of FIG. [Figure 6] (a) is a schematic diagram showing an air valve connected to an earthquake-resistant repair valve, and (b) is a schematic diagram showing a fire hydrant connected to an earthquake-resistant repair valve. [Figure 7] 1A is a schematic diagram showing the flexible state of an air valve connected to an earthquake-resistant repair valve, and FIG. 1B is a schematic diagram showing the flexible state of a fire hydrant connected to an earthquake-resistant repair valve. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an earthquake-resistant repair valve according to the present invention will be described in detail below with reference to the drawings. 1 and 2 show an embodiment of an earthquake-resistant repair valve according to the present invention.

[0021] The earthquake-resistant repair valve of the present invention has a repair valve body 10 equipped with a flange portion 21 on the secondary side, and a holder 11 on the primary side, and an expandable and flexible mechanism 12 is provided inside the holder 11, which allows the repair valve body 10 to be expandable and flexible relative to the holder 11. Furthermore, a tilt correction jig 20 is provided between the repair valve body 10 and the holder 11. When the repaired valve body 10 is bent and tilted, the repaired valve body 10 is made to stand upright relative to the holder 11, and a tilt correction jig 20 is attached between the flange portion 21 and the holder 11 to maintain the upright state.

[0022] In FIG. 2(b), the repair valve body 10 has a body 22 formed of a metal material, and a substantially circular flange portion 21 is formed on the secondary side of this body 22. Through this flange portion 21, piping equipment 23 such as an air valve or a fire hydrant can be attached using a connecting bolt 24 such as a hexagonal bolt and a connecting nut 25 such as a hexagonal nut. An insertion port 26 is formed extending from the primary side of the body 22, and a wide groove 27 of a predetermined width is formed on the outer periphery of this insertion port 26. The repair valve body 10 can be connected to the holder 11 via the insertion port 26.

[0023] A valve element 30 made of a ball is attached inside the body 22, and a stem 31 is connected to the valve element 30, to which an operating handle 32 is attached. The valve element 30 is provided so as to be capable of opening and closing a flow passage 33 formed inside the body 22 via the stem 31 by rotating the operating handle 32. A valve seat 34 is attached to the primary side of the valve element 30 inside the body 22, and a valve seat 35 is attached to the secondary side of the valve element 30 of the body 22 via a valve seat receiver 36. Thus, in this example, the repair valve main body 10 is provided in a ball valve structure.

[0024] On the other hand, the holder 11 is composed of an annular socket member 40 and an annular press ring 41 attached to the upper part of the socket member 40, which are fixed with a connection bolt 28 such as a hexagon socket head bolt, and the repair valve body 10 is connected to a pipe flange 42 of a branch pipe, which is the primary side external pipe, via the holder 11 with a piping embedded bolt 29 and a connection nut 25. Although not shown, the branch pipe is composed of a T-pipe that branches vertically from the horizontally arranged water main and is connected to the water main.

[0025] The press ring 41 is made of a metal material and is formed in a generally circular disk shape, with an insertion hole 43 formed in the center with an inner diameter that allows the insertion hole 26 to be inserted loosely. An enlarged diameter step 45 is formed on the lower side of the insertion hole 43, onto which a retaining ring 44 (described later) can be attached. Meanwhile, an enlarged large diameter step 46 is formed on the upper side of the insertion hole 43, and this large diameter step 46 prevents interference with the insertion hole 26 of the tilted repair valve body 10.

[0026] The receiving member 40 is made of a metal material and formed into a generally circular disk shape, with an annular step 47 for mounting a retaining ring 44 of generally the same diameter as the enlarged diameter step 45 formed on the top surface of this receiving member 40, and a smaller diameter step 49 for housing a rubber ring 48 (described later) formed adjacent to this annular step 47. A reduced diameter protrusion 50 is formed on the inner periphery of the bottom surface of the receiving member 40, and this protrusion 50 provides a contact surface for a gasket (not shown) that is mounted when joining to the external piping flange 42. The socket member 40 is provided with an outer diameter that allows it to be fixed to a pipe flange 42 by a connection bolt 24 and a connection nut 25 .

[0027] The expandable and contractible mechanism 12 has the insertion port 26 formed in the body 22, as well as a retaining ring 44 and a rubber ring 48.

[0028] The retaining ring 44 is formed in an annular shape from a metal material, has a thickness that allows it to be attached in a clamped state within the attachment groove 51 described below, and is greater than the length of the wide groove 27. An annular ridge 52 is formed on the upper inner periphery of the retaining ring 44 so as to protrude toward the inner diameter side, and this ridge 52 is provided to a length that allows it to be engaged with the wide groove 27. The retaining ring 44 is provided as a divided ring, and due to this divided structure, it is provided so that it can be attached to the attachment groove 51 with the ridge 52 engaged with the wide groove 27.

[0029] The rubber ring 48 is made of a highly elastic rubber material and is formed into a ring shape that can be accommodated in the small diameter step portion 49, and is attached between the receiving member 40 and the insertion port 26 to ensure a seal between them.

[0030] The telescopic flexible mechanism 12 is configured such that the insertion port 26 is loosely inserted into the inner periphery of the holder 11, and a retaining ring 44 and a rubber ring 48 are attached between the insertion port 26 and the holder 11. In this case, when the receiver member 40 and the press ring 41 are overlapped, the mounting groove 51 for mounting the retaining ring 44 is formed by the annular step 47 of the receiver member 40 and the enlarged diameter step 45 of the press ring 41, the rubber ring 48 is housed in the small diameter step 49, and with the retaining ring 44 attached to the mounting groove 51, the press ring 41 and the receiver member 40 are fixed together by the connecting bolt 28 to be integrated.

[0031] Tightening the pressure ring 41 presses the rubber ring 48 via the retaining ring 44, and the pressure ring 41 engages the protrusions 52 of the retaining ring 44 with the wide groove 27, preventing the body 22 from slipping out of the socket member 40 and the pressure ring 41, and the rubber ring 48 exerts its sealing properties to prevent leakage. In this way, the retaining ring 44 and rubber ring 48 are attached in a specified state by a single pressure ring 41, resulting in a compact design.

[0032] After the receiving member 40 and the push ring 41 are combined, an expandable and flexible space S is formed between the lower portion of the protrusion portion 52 and the wide groove 27, and in the event of an earthquake, the body 22 side located on the secondary side expands and flexes in the vibration direction and the connection direction relative to the retaining body 11 side located on the primary side, via this expandable and flexible space S and the large diameter step portion 46 at the top of the insertion port 43, thereby demonstrating earthquake resistance.

[0033] Even during this expansion and contraction, the rubber ring 48 ensures a seal between the insertion port 26 and the receiving port member 40, so that even if the insertion port 26 side is significantly tilted relative to the holding body 11, the rubber ring 48 exerts its elastic force to ensure a tight seal against the outer periphery of the insertion port 26 and the inner periphery of the small diameter step portion 49 of the receiving port member 40, reliably preventing leakage.

[0034] A rubber cover 53 is provided between the body 22 and the push ring 41. This rubber cover 53 is formed in an annular shape from an elastic rubber material, and is removably attached in an expandable state to engagement portions formed on the body 22 and the push ring 41. This rubber cover 53 prevents water, dirt, etc. from entering the expandable flexible mechanism 12, and this rubber cover 53 is prevented from falling off by deforming accordingly even if the repair valve body 10 is significantly tilted due to an external force such as an earthquake, or is pulled out in the flow path direction.

[0035] The tilt correction jig 20 shown in Figures 3(a) to 3(c) is formed into a substantially cylindrical shape using a resin pipe such as a VU pipe (polyvinyl chloride pipe) and in this example is provided in a two-split structure by split bodies 20a, 20a. The height H of the tilt correction jig 20 is substantially the same height as the distance from the bottom surface of the flange portion 21 to the top surface of the pressure ring 41 of the holder 11, and in this example is provided slightly shorter, so that the height H of the tilt correction jig is 67 mm, the distance from the bottom surface of the flange portion 21 to the top surface of the pressure ring 41 is 70 mm, and the face-to-face dimension of the flange portion of the earthquake-resistant repair valve is 150 mm.

[0036] A plurality of notched locking portions 60 are formed along the circumferential direction at the upper and lower ends of the inclination correcting jig 20. The upper and lower locking portions 60 are formed with a predetermined notch width and depth at positions corresponding to the connecting bolts 24, 28 and the connecting nuts 25 attached to the flange portion 21 side of the body 22. In this embodiment, four locking portions 60 corresponding to the positions of the four connecting nuts 25 (connecting bolts 24) are formed on the upper end side of the inclination correcting jig 20, and four locking portions 60 corresponding to the positions of the four connecting bolts 28 are formed on the lower end side. In the tilt correction jig 20, a notched relief portion 62 is formed at a position corresponding to a stem storage portion (shaft mounting portion) 61 provided in the repaired valve body 10.

[0037] 1 and 2, the inclination correction jig 20 is attached with its upper and lower ends sandwiched between the flange portion 21 and the holder 11 and surrounding the repaired valve body 10. At this time, each divided body 20a is attached with the locking portion 60 locked from the outside to the connection bolts 24, 28 and connection nuts 25 attached to the flange portion 21 and the holder 11, respectively, thereby fixing the inclination correction jig 20 to the flange portion 21 and the holder 11, and the inclination correction jig 20 can be attached while being elastically deflected. The stem storage portion 61 fits within the relief portion 62, so that the inclination correction jig 20 can be attached to the outer periphery of the repaired valve body 10 while avoiding the stem storage portion 61. Although not shown, after the inclination correction jig 20 is attached, a rubber band may be wrapped around its outer circumference or tied with string. In this case, separation of the divided body 20a can be prevented and the attached state of the inclination correction jig 20 can be maintained.

[0038] FIG. 4(a) shows another example of the inclination correction jig. This inclination correction jig 70 is provided as an integral structure having an opening 71 at a free end by cutting a part of a cylindrical portion. As shown in FIG. 4(b), a notch 72 is formed at an angle of approximately 90° on the outer circumferential surface on the side opposite the opening 71, and the inclination correction jig 70 can be bent and deformed near the notch 72. As a result, the inclination correction jig 70 is provided as a so-called hinge structure, and the opening 71 is opened while being elastically deformed around the notch 72, so that the inclination correction jig 70 can be attached to the flange portion 21 and the holder 11.

[0039] 5(a) and 5(b) show another example of an earthquake-resistant repair valve. In this earthquake-resistant repair valve, an extension pipe 81 is provided in the flow path direction of a repair valve main body 80, and a fixing flange portion 82 is provided in the middle of the extension pipe 81. The fixing flange portion 82 is provided integrally or separately at a predetermined position of the extension pipe 81 so that the distance from its bottom surface to the top surface of the pressing ring 41 of the holder 11 is approximately the same as the distance (70 mm) from the bottom surface of the flange portion 21 of the repair valve main body 10 to the top surface of the pressing ring 41. This makes it possible to attach the tilt correction jig 20, which has the same height H as the tilt correction jig 20, between the fixing flange portion 82 and the holder 11. In the earthquake-resistant repair valve of this example, the face-to-face dimension of the flange portion is set to 300 mm.

[0040] The earthquake-resistant repair valve of the present invention can be connected to various branch pipes other than T-shaped pipes, and can also be connected to piping such as vertical piping other than branch pipes. In this embodiment, the repair valve body has a ball valve structure, but it can also be provided in various valve structures other than ball valves.

[0041] The tilt correction jig may be made of a resin material other than the VU tube, or may be made of other materials. When the tilt correction jig has a divided structure, it may be provided with a divided structure of two or more parts. Only one locking portion may be formed for the tilt correction jig, and the number of locking portions as well as their width and depth can be set appropriately according to specifications such as the number, nominal diameter, and length of the connecting bolts and connecting nuts, and the shape of the notch in the escape portion can also be set arbitrarily depending on the size of the stem storage portion, etc.

[0042] Next, the operation of the earthquake-resistant repair valve of the present invention in the above embodiment will be described. 1 and 2, the body 22 of the repair valve main body 10 is connected to the holder 11 via the expandable and flexible mechanism 12, and the body 22 is prevented from coming off by the retaining ring 44, and the rubber ring 48 is used to ensure sealing and expandable flexibility, so that when an external force is applied due to an earthquake or the like, the repair valve main body 10 can expand and contract in the flow path direction and the vibration direction relative to the holder 11. As a result, even if the repair valve is buried underground and is subjected to an impact such as a collision with the valve case due to an earthquake, earthquake resistance is exhibited via the expandable and flexible mechanism 12, and damage to parts and water leakage can be prevented.

[0043] When the repaired valve body 10 is bent and tilted, the body 22 side is in an upright state relative to the holder 11 side, i.e., the entire repaired valve is in an upright state, and the tilt correction jig 20 is attached in a state surrounding the repaired valve body 10 while the upper and lower ends of the tilt correction jig 20 are sandwiched between the flange portion 21 and the holder 11, so that the upright state can be maintained. As a result, after the tilt correction jig 20 is attached, the bottom surface of the flange portion 21 contacts the upper end of the jig 20, and the upper surface of the pressing ring 41 contacts the lower end of the jig 20 in a circumferential manner, and the flange portion 21 and the pressing ring 41 are regulated to a substantially horizontal state to prevent shaking, and the repaired valve can be maintained in an upright state. Therefore, the repaired valve can be used continuously after it is restored after bending. Moreover, since the inclination correction jig 20 can be attached by utilizing the flange portion 21 and the holder 11, the inclination correction jig 20 can be attached in a specified state while regulating its position without providing a separate attachment portion on the repair valve.

[0044] If an earthquake or the like occurs with the tilt correction jig 20 attached, the tilt correction jig 20 moderately restricts the expansion and contraction of the repaired valve body 10 relative to the holder 11, and the elasticity of the tilt correction jig 20 allows the repaired valve body 10 to expand and contract while absorbing shock. This makes it possible to suppress sudden expansion and contraction of the repaired valve body 10 and prevent damage to the components of the repaired valve body. In this case, if the tilt correction jig 20 is damaged due to the tilt of the repaired valve body 10 relative to the holder 11 caused by an earthquake, the tilt correction jig 20 can be removed and another tilt correction jig 20 can be attached in the same manner as described above with the repaired valve body 10 again standing upright.

[0045] By using a VU pipe for the tilt correction jig 20, it is possible to easily process the notched locking portion 60 and the relief portion 62 using a general-purpose pipe, and manufacturing is also simplified. It is possible to ensure strength while reducing weight, and the repaired valve can be kept upright for a long period of time.

[0046] When installing the tilt correction jig 20 with a two-piece structure shown in Fig. 3, in Fig. 1 and Fig. 2, the repair valve body 10 is manually held upright relative to the holder 11, and the stem storage section 61 is allowed to escape into the relief section 62 while the jig is attached so as to sandwich the repair valve body 10 from its side. At this time, the jig can be attached by hooking the locking section 60 from the outside of the connecting bolt 24 and the connecting nut 25 while bending each divided body 20a using its elasticity, making the installation work easy and also easy to remove. After installation, the periphery of the locking section 60 is locked to the connecting bolts 24, 28 and the connecting nut 25, preventing it from falling off naturally.

[0047] On the other hand, as shown in Fig. 4, when an integrally structured tilt correction jig 70 is attached, the tilt correction jig 70 can be bent and deformed in a direction to open the opening 71 around the vicinity of the notch 72, and can be attached in a surrounding state to the side of the repaired valve body 10 from the opening 71. In this case, too, the stem storage section 61 can be easily hooked from the outside of the connection bolts 24, 28 and the connection nut 25 by hooking the locking section 60, while allowing the stem storage section 61 to escape into the relief section 62, as in the above case. After the tilt correction jig 70 is attached, a force is applied in a direction to return it to its original cylindrical shape via the notch 60, so that the attached state can be maintained without it naturally falling off.

[0048] In either case of the tilt correction jigs 20 and 70 described above, the engaging portions 60 are formed by notches, so that the portions sandwiched between the engaging portions 60 have a thin rib shape, making it easier to bend the entire jig and easier to attach and remove.

[0049] As shown in FIG. 5, the repair valve body 80 is extended by an extension pipe 81, and a fixing flange portion 82 is provided in the middle of the extension pipe 81. Installed at the end of the extension pipe When the distance between the holder 11 is set so that a tilt correction jig 20 of height H can be attached, the repair valve can be held upright while using the same tilt correction jig 20 even when the repair valve body 80 is installed in a long shape. Therefore, even when the repair valve body 80 is extended and installed at a deep position, one type of tilt correction jig 20 or tilt correction jig 70 can be used and installed with one touch, without separately installing tilt correction jigs of different types.

[0050] Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention as described in the claims of the present invention. [Explanation of symbols]

[0051] 10, 80 Repair valve body 11 Holding body 12 Telescopic flexible mechanism 20, 70 Tilt correction jig 20a Division 21 Flange 24 Connection bolt 25 Connection nut 26 Insertion port 40 Receiver member 41 Push Ring 44 Locking ring 48 Rubber Ring 60 Locking part 71 Opening 72 Notch 81 Extension pipe 82 Fixing flange H Height of tilt correction jig

Claims

1. A flange portion is formed on the secondary side of the body of the repair valve main body, and an insertion port is formed on the primary side of the body, and the insertion port is inserted in a loosely fitted state into the inner periphery of a holder consisting of an annular press ring and an annular receiving member, and an elastic flexible mechanism equipped with a stopper ring and a rubber ring is built in between the insertion port and the holder, and a substantially cylindrical tilt correction jig formed of an elastic material is engaged between the flange portion and the holder, or between a fixing flange portion provided midway along a long extension pipe extending from the insertion port and the holder provided at the end of the extension pipe. an inclination correction jig provided at the end of the extension pipe, the inclination correction jig is provided at a height substantially equal to the gap distance between the fixing flange portion and the holder when the extension pipe is not provided, and the height of the inclination correction jig is set to be substantially the same; when the repair valve body flexes and tilts, the repair valve body bends or damages the inclination correction jig, while absorbing impact due to the elasticity of the inclination correction jig, thereby suppressing sudden expansion and contraction of the repair valve body.

2. 2. The earthquake-resistant repair valve according to claim 1, wherein the tilt correction jig is manufactured by processing a resin material to which elasticity has been imparted.

3. An earthquake-resistant repair valve as described in claim 1 or 2, wherein when the repair valve body to which the tilt correction jig is attached flexes and tilts, the bent or damaged tilt correction jig is removed from the repair valve body, and another tilt correction jig is attached while the repair valve body is again in an upright position.

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